Vladimir Kara-Murza, a critic of Putin, placed in Siberian jail's isolation unit

Russian opposition activist Vladimir Kara-Murza, who had been imprisoned in Moscow, has been transferred to a high-security prison in Siberia. His lawyer reported that he was placed in an isolation cell in the Omsk penal colony, and expressed concern about his client's health due to the conditions there. Kara-Murza, who survived two poisonings, was sentenced to 25 years in prison in April on charges of treason and lying about the war in Ukraine. The charges stemmed from a speech he gave denouncing Russia's invasion of Ukraine. His lawyer said that Kara-Murza arrived at the maximum-security penal colony last week. The activist's previous attempts on his life have caused nerve damage called polyneuropathy, and he has been a vocal advocate for Western countries to impose sanctions on Russian officials. The journey from Moscow to Omsk is approximately 2,700km (1,670 miles), and the Russian penal system often takes weeks to transport prisoners between facilities, with little information provided about their whereabouts during transit.